Snow Cover (1 month - Terra/MODIS)

Snow Cover (1 month - Terra/MODIS) | NASA

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About this dataset

When air temperature falls below freezing (0°Celsius), the water droplets in clouds harden into ice crystals. Such crystals may grow into large, lacey snowflakes; or they may stick together to form odd-shaped clusters of ice crystals. When they grow heavy enough, the ice crystals fall to the ground as snow. If the ground temperature is also below freezing, the snow can build up into a bright white blanket covering the surface. Snow cover is an important part of Earth's environment. Because it reflects most of the sunlight that hits it, snow helps to cool Earth's surface. Many areas of the world rely on snowmelt for drinking water and water for their crops. So scientists monitor where and how much of Earth's landscape is covered by snow.

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November 2014

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1.0 degrees 360 x 180 download
0.5 degrees 720 x 360 download
0.25 degrees 1440 x 720 download
0.1 degrees 3600 x 1800 download
CSV for Excel older than 2007 download

What do the colors mean?

In these maps, the white areas show lands that were completely snow-covered on the dates shown. The light blue shades show regions in which there was only partial snow cover.

Related Websites

MODIS

Terra

MODIS Snow/Ice Global Mapping Project

National Snow and Ice Data Center (NSIDC)

ATBD (Algorithm Theoretical Basis Document)

MODIS Snow and Sea Ice-Mapping Algorithms

Credits

Images by Reto Stockli, NASA's Earth Observatory, using data courtesy the MODIS Land Science Team at Goddard Space Flight Center.

Federal Geographic Data Committee Geospatial Metadata

View the FGDC Metatdata for Snow Cover (1 month - Terra/MODIS)

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